The sensor is S1 in this alarm that we found in a Radio Electronics magazine from May 1971. Several sensors can be used in series. The SCR supports equivalents from the 106 series.
Random pulses are produced by this multiple oscillator using unijuncion Transistors. The...
This watch was found in 2001 documentation. The watch is powered by 4 batteries. To save energy, the...
This circuit with the PA7601 was found in a 1967 Philco-Ford documentation. The circuit has a pass...